:root{color-scheme:light;--surface:#fff;--ink:#434343;--muted:#888;--stroke:#ebebeb;--card:#fafafa}*{box-sizing:border-box}body{margin:0;background:var(--surface);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:18px;line-height:1.6}main{max-width:760px;margin:auto;padding:48px 24px 72px}nav,footer{display:flex;flex-wrap:wrap;gap:16px}nav{align-items:center;border-bottom:1px solid var(--stroke);padding-bottom:24px;margin-bottom:36px}nav img{width:112px;height:auto}nav a:first-child{margin-right:auto}a{color:inherit;text-underline-offset:4px}h1{font-size:35px;font-weight:600;line-height:1.2;letter-spacing:-1px;margin:0 0 8px}h2{font-size:26px;font-weight:600;line-height:1.3;letter-spacing:-.65px;margin:36px 0 12px}p,ul{margin:12px 0}.muted{color:var(--muted)}.notice{background:var(--card);border:1px solid var(--stroke);border-radius:20px;padding:16px 20px;margin:24px 0}.button{display:inline-block;background:var(--ink);color:var(--surface);border-radius:999px;padding:16px 24px;font-size:20px;font-weight:600;text-decoration:none;margin:16px 0}footer{border-top:1px solid var(--stroke);margin-top:48px;padding-top:24px;font-size:16px}@media(max-width:480px){main{padding:36px 20px 48px}nav{gap:12px;font-size:16px}h1{font-size:35px}}
.button { box-shadow: 0 12px 50px rgba(0,0,0,.12), inset 0 0 16px rgba(255,255,255,.50); transition: box-shadow 220ms ease; }
nav a { transition: color 180ms ease; }
@media (hover: hover) { nav a:hover { color: #888; } .button:hover { color: var(--surface); box-shadow: 0 12px 50px rgba(0,0,0,0), inset 0 0 24px 2px rgba(255,255,255,.75); } }